For my sculpties I use AC3D. Its a very simple but effective 3D program and you don't need to have Blender or Maya skills to handle it. You can download a trial version here www.inivis.com.
Click now only one Vertice to activate it and move it a bit inside the cube with the moving arrows.
Et Voila! You can texture the pillows now as you like. To specify the pillows with the appropriate shadow and light settings you can use the abc template, which you can download below (right click and save on your hardrive):
Another possibility is of course to texture it in Photoshop CS4, which has the ability to import 3D objects and paint directly on them. But that would be another tutorial.
Please experiment as much as you can with the AC3D program. The more you do, the more you will understand it.
Love and Peace